Ground-wire clamp



(No Model.)

- H. W POPE.

GROUND WIRE CLAMP. No. 283,276. Patented Aug. 14, 1883.

WITNESSES INVENTOR.

W2 Q By his Momma flenrynrr PATENT OFFICE. 1

HENRY w. rorE, or ELIZABETH, NEW JEEsEY.

GROUND-W IRE CL'AMP.

SPECIFICATION forming part of Letters Patent 110.283,?76, dated August14, 1883.

Application filed March 21,1883. (Nomodel.)'

To all whom, it may concern.- I

Be it known that I, HENRY WV. Porn, a citizen of the United 1 States,and a resident of Elizabeth, in the county of- Union and State of me May21, 1881, I have shown and described a clamp for securing telegraphic,telephonic, or other electric conductors to gas, water, or other pipes,or to rods connected with the ground, whereby an earth terminal for theconductor, through the agency of pipes or rods, may be effected cheaply,effectively,and with out the necessity of soldering.

My presentinvention relates tothe subjectmatter of said application; andits object is-to simplify and cheapen the form of the clamp thereindescribed, at the same time producing a clamp which may be readilyapplied to pipes and rods in special positions and situations to whichthe application of my former clamp would sometimes be inconvenient ordifficult. I l

The subject-matter claimedas new will be hereinafter specificallypointed out.

In the accompanying drawings, Figure 1 is a view in perspective of myimproved clamp as applied to a pipe orrod, and Fig. 22 1s a sec:

tional view of the same. J. 1

Referring to the drawings, A is the body of the clamp, which ispreferably made of cast metalsuch as brass-and is provided with a curvedinner surface, as shown,,adapted to fit the cylindrical. metallic pipe13, and expose a considerable surface to make metallic contacttherewith, in order to form an efficient electrical connection.

O is a screw which passes through a threaded aperture in one end of thebody of the clamp and bears againstthe exterior of the pipe, therebyholding the clamp firmly in position and in contact'with the pipe.

' The endof the wire-D, which forms the terminal of a telegraphic,telephonic, or other line. of electrical communication, is bent into\ aloop,and is firmly attached to and in electrical contact with the clampby means, of the screw F, which secures the loop between the metallicwashers E E.

The clamp above described is especially 1 adapted for application to apipe which is situated in direct contact with a wall or partition, sothat one portion of its circumference is not accessible. I

It may be preferable in some cases, instead of making use of abinding-screw, to solder a short piece of wire. to the body of theclamp,

and to connect this short piece of wire with the conductingwire bysplicing or twisting their ends together in a well-known manner.

In order to make a perfect metallic connection between the clamp and thepipe or rod to which it is attached, the outer surface of the pipe orrod and the inner surface of the clamp should be brightened by rubbingthem with a file or emery-paper before putting them .together.

The device hereinbefore described may with advantage be constructed of anumber of different sizes corresponding to the regular sizes ofcommercial gas and-water pipe.

I claim as my invention- 1. As a new article of manufacture, thehereinbefore-described ground-wire clamp for electrical conductors,consisting of the metallic body, having its inner surface made con caveto fit a cylindrical pipe or rod, and the screw for securing it to thepipe or rod and maintaining it in metallic contact therewith.

2. The combination, substantially as here'- inbefore set forth, of themetallic body of the clamp, having its inner surface made concave to fita cylindrical pipe or rod, and provided with a screw for securing thesame thereto,

and an electrical conductor attached to or con-' nected with the clamp.

In testimonywhereof I have hereunto subscribed my name this 20th day ofMarch, A. D. 1883.

Witnesses:

DANIEL WV. EDGEOOMB,

CHARLES A. TERRY. r

HENRY w. Porn.

